Machine for beading bodies of sheet metal barrels



April 14, 1936.

B. J. ILINDGREN MACHINE FOR BEADING BODIES OF SHEET METAL BARRELSOriginal Filed Dec. 21, 1952 '3 Sheets-Sheet 1 SN w April 14, 1936. B.J. LINDGREN MACHINE FOR BEADING BODIES OF SHEET METAL BARRELS OriginalFiled Dec.

21, 1932 5 Sheets-Sheet 2 RNN 3N NNN mww H 3.

April 14, 1936. B. J. LINDGREN MACHINE FOR BEADING BODIES OF SHEET METALBARRELS Original Filed Dec. 21, 1932 3 Sheets-Sheet 3 Patented Apr. 14,1936 UNITED STATES PATENT OFFICE MACHINE FOR BEADING BODIES OF SHEETMETAL BARRELS Original application December 21, 1932, Serial No.648,184, now Patent No. 2,004,816; dated June 11, 1935.

Divided and this application July 26, 1933, Serial No. 682,312

" 21 Claims. 01. 153-73) This invention relatesto a machine for formingcircumferential beads on sheet .metal barrel drums, bodies or shells,and it is the object of this invention to provide an improved apparatusfor performing this operation, as will be fully set forth hereinafter.This application is a division of an application filed December 21, 1932and serially numbered 648,184. y

In the accompanying drawings:

Figure 1 is a plan view showing the bead expanding mechanism embodyingmy invention, and part of the conveyor mechanism associated therewith.

Figure 2 is a front elevation of the same.

Figure 3 is a. vertical longitudinal section of the bead expandingmechanism, taken on line 3-3 Fig. 1.

Figure 4 is a horizontal section of the bead expanding mechanism, takenon line 4-4 Fig. 3.

Figure 5 is a fragmentary vertical longitudinal section, on an enlargedscale, showing the telescopic portion of the piping whereby the pressurefluid is supplied to the hydraulic motor on one of the expander s1iporting slides of the bead expanding mechanism.

Figure 6 is a vertical section taken on the correspondingly numberedline in Fig. 5.

Figure 7 is a vertical transverse section of the bead expandingmechanism, on an enlarged scale, together with the adjacent part of thedrum conveyor mechanism, taken on line 1-1 Fig. 3.

Figures 8 and 9 are fragmentary vertical transverse sections taken onthe correspondingly numbered lines in Fig. 3.

Figure 10 is a fragmentary longitudinal section, showing the connectionbetween one of the expander follower rods and the piston rod of themotor which actuates the same.

Figure 11 is a fragmentary vertical transverse section, on an enlargedscale, taken on line I l-l I Fig. 3.

Figure 12 is a fragmentary vertical transverse section, taken on linei2-l2 Fig. 3, showing the drum resting on the saddle.

In the following description similar characters of reference indicatelike parts in the several figures of the drawings:

Each of the barrel drums, or shells which is adapted to be operated uponby the mechanismthe purpose of forming thereon two laterally projectingcircumferential beads I02 adjacent to opposite ends thereof, which beadsare preferably spaced equal distances from the longitudinal center ofthe body, as shown in Fig. 3.

Preferably, though not necessarily, each of these beads is formed by twosuccessive operations, the first of which serves to expand the metalcircumferentially on a part of the cylindrical body of the barrelwithout appreciably stretching or thinning of the metal; while thesecond operation serves to roll this expanded metal so that a completedbead is formed on the body which projects a substantial distancelaterally from'the side of the body and brings the two side walls ofeach head closer together and more nearly parallel to radial lines drawnfrom the axis of the barrel so that these beads will serve moreeffectively for bearing surfaces on which the barrel may be rolled whileloaded with various contents, without liability of the beads breakingdown or causing leakage.

These operations of preliminarily expanding a part of the body of thebarrel and partially forming the beads and then rolling these expandedparts of the barrel body for the purpose of completing the formation ofthe beads without thinning the metal but instead insuring thefulleststrength of the same, form the subject of the Letters Patent No.1,908,521 dated May 9, 1933, and reference may be had to the same for amore complete disclosure of this process.

The present application is based on the mechanism whereby expansion ofthe bead on the body of the barrel is effected.

The numeral I03 represents the main part of the stationary frame of thismachine which may be of any suitable construction for the purpose ofsupporting the various working parts of the mechanism forming thesubject of this application.

In its general organization this mechanism comprises an expandingmechanism whereby parts of the cylindrical body of the barrel areexpanded in the process of forming the circumferential beads thereon,and a conveyor mechanism whereby the barrel bodies are fed through themachine and successively presented to the expanding mechanism anddischarged therefrom.

This conveyor mechanism is arranged lengthwise of the machine while theexpanding mechanism is arranged transversely of the longitudinal path ofthe. barrel drums as the latter progresses through the machine.

' Arranged lengthwise of the machine is a longitudinal track upon thefront part of which the barrel bodies or drums are placed eithermanually by the operator or by mechanical means, into a position inwhich the axis of the body is arranged'horizontally and transverselyrelative to this track, and over which this body is conveyed while inthis position, and presented to the bead expandingmechanism andultimately discharged from the rear or delivery end of this track.

This track in the preferred organization comprises two longitudinalparallel rails I04, which are stationarily mounted on the main frame inany suitable manner, the rail members being arranged on opposite sidesof the longitudinal centerof the track and spaced a suitable distanceapart so as to support the sheet metal drums on their undersidesadjacent to the flanges IIII at opposite ends thereof as the drums aremoved from the front end of the track to the rear end thereof in theirprogress through the machine.

After a drum which is to be beaded has been placed upon the rails I Illof the track, as shown in Fig. 7, the operator rolls this drum forwardlyinto a position in which the drum comes within the working range of theconveyor mechanism, which last-mentioned position is represented by thedrum located at the left in Fig. 7. This position, for convenience ofdescription, will be referred to as the first or receiving stationNo. 1. During the first step of the operation of the conveyor mechanismthe drum is advanced toward the rear of the machine and remainstemporarily at rest in a position which will be designated as the secondstation No. 2 preparatory to expanding the body of the barrel forproducing the beads thereon.

During the third step of the conveyor mechanism the drum is taken fromstation No. 2 and may be advanced on the rails of the track to meanswhich may perform other operations on the barrel body, and then thelatter is ultimately discharged from the machine.

Any suitable conveyor mechanism may be employed for moving the barreldrums or bodies to and from the heading station on the tracks but theone shown in the drawings consists generally of longitudinally movablefeed bars A arranged below the path of the barrel drums, feeding dogs Badapted to engage the rear side of the drums, and stop'dogs C adapted toarrest the forward movement of the drums. This conveyor mechanism isfully described in said patent application Serial No. 648,184 filedDecember 21, 1932 and reference may therefore be had to the same for amore detailed explanation as to its construction and operation.

After each drum arrives at the bead expanding mechanism, which isrepresented by station No. 2, the drum conveyor mechanism reaches theend of its forward stroke and the drum remains at rest during thefollowing backward stroke of the conveyor mechanism, and during thisperiod of rest, so far as the forward longitudinal movement of the drumis concerned, the same is lifted into a position in which its oppositeends are in alignment with the two sections of the expanding mechanismwhich are arranged on opposite sides of the path of the barrel drums orbodies and adapted to form beads circumferentially on the drum adjacentto opposite ends thereof.

This lifting mechanism cooperates with other parts so as to hold thebarrel positively in its centered position with reference to the beadexpanding mechanism, and as best shown in Figs. 1, 2, '1. and 12. isconstructed as follows:

The numeral I 68 represents two longitudinal bars of a saddle which isadapted to raise the drum and each of which is provided on its upperside with a v-shaped seat I681; for engagement with the underside of thedrum adjacent to one end thereof, so that when the seats of these twobars engage with the drum the latter will be centered with reference tothis elevating mech anism and maintained in this position while beinglifted. These saddle bars, during the forward stroke of the conveyormechanism, are arranged below the path of the drums, as represented bydotted lines in Fig. 7; and after the conveyor mechanism reachesthe-forward end of its stroke these saddle bars rise, and by engagementwith the underside of the drum, lift the latter so that the same isaxially in line with the elements of the plurality of bead expandingmechanisms which are adapted to form the beads on the drum, as shown byfull lines in Figs. 3 and 7.

These saddle bars form part of a vertically movable lifting frame whichcomprises upright bars I69 connected at their upper ends with oppositeends of the saddle bars I68, horizontal transverse bars I10 connectingthe lower ends of the corresponding upright bars I69, and a verticallymovable slide I1I provided with laterally proiecting arms I12 which areconnected with the intermediate parts of said transverse bars I10. Theslide I" is guided in its vertical movements on a guide rod I14depending from the adjacent part of the main frame I03. The cooperatingsurfaces of this slide and the guide rod I14 are of non-circular form sothat the slide is free to rise and fall on this rod but incapable ofturning thereon, thereby always maintaining the saddle bars in theproper position relative to the parts with which the same cooperateduring the operation of the machine.

The power for raising and lowering this lifting frame is preferablyderived from a hydraulic motor having a horizontal cylinder I13 mountedtransversely on the lower part of the mainframe, a piston I15reciprocating in this cylinder and provided with a piston rod I16extending through one head of the cylinder. This piston is reciprocatedby alternately admitting a live pressure fluid into and exhausting thespent pressure fluid from opposite ends of this cylinder by means of asuitable valve mechanism.

Motion is transmitted from this motor to the lifting frame by means of adriven lever of elbow or bell crank form and having a lower horizontalarm I11 which is connected at its free end by means of a link I18 withthe slide HI and has an upwardly projecting adjusting arm I19; and adriving lever of straight form having a lower arm I80 which is connectedby means of a link I8I with the piston rod I15 while its upper adjustingarm I82 is connected with the adjusting arm I19 of the driven lever. Thedriving and driven levers of this transmitting mechanism are so mountedand connected with each other that the vertical strokes of the liftingframe may be regulated to insure accurate alignment of the drum with theexpanding mechanism in the elevated position of the drum and also topermit of adapting the machine to drums of various diameters and stillmaintain a uniform stroke of the piston I15 of the hydraulic motor. Thisis preferably accomplished by the means disclosed in said patentapplication.

The mechanism of this machine is so timed that after the conveyorreaches the end of a forward stroke and the respective feeding dogs ofthe same bring a drum to the expanding station of the machine, then thelifting mechanism is operated by its motor so that the saddle engageswith the underside of the respective drum and raises the same from theconveyor into a position in which the drum is axially in alignment withthe operating elements of the bead expanding mechanism and enable thesame to operate properly upon the drum for the production of beadsthereon.

In order to positively hold the drum in a position in which it isaligned with the expanding mechanism, means are provided which areengaged by the upper side of the drum in its elevated position sothatthe drumis gripped both on its underside and on its upper side andthereby reliably held in place while the bead expanding mechanism isoperating upon the same.

Various means may be provided for this purpose but those shown in thedrawings have been found satisfactory in practice. As there shown, thesemeans comprise two retaining or abutment heads or bars I96 arrangedabove the path of the drums at the expanding station and adapted to beengaged by the upper side of the drum adjacent to opposite ends thereofwhen the same is in its elevated position, as shown in Figs. 3 and '7, avertical adjusting rod I91 projecting upwardly from each of theseretaining heads and slidably mounted in a pair of guide lugs I98 whichare mounted on the upper part of an overhanging arch I99 forming part ofthe stationary frame of the machine, an adjusting collar 200 arrangedupon the adjusting rod I91 between the guide lugs I98, and a set screw20l threaded into this collar and engaging this rod. Upon loosening thescrew 2M the rod I91 may be adjusted vertically in order to bring theabutment head I 96 into the proper position to be engaged by the upperside of the drum when the latter has been elevated by the liftingmechanism into a position in which it is accurately in alignment withthe bead expanding mechanism, thereby holding the drum reliably in placeduring the subsequent operations of forming beads thereon.

After the drum has been elevated from the conveyor mechanism into aposition in which it is in axial alignment with the bead expandingmechanism, the same is operated upon by the ex panding mechanism forproducing the circumferential beads thereon adjacent to opposite ends ofthe drum. This expanding mechanism comprises two sections D, E which arearranged along opposite sides of the conveyor mechanism at the expandingstation, and each of these expand ing mechanisms is adapted to produceone of the beads on the drum at a point between the center and the endthereof, as will presently appear.

The two sections of this expanding mechanism are mounted respectively onhorizontally and transversely movable slides or carriages 202d, 202ewhich are arranged on opposite sides of the path of the drum conveyingmechanism, and each of which is guided on the main frame by means offlanges 203 arranged on the lower part of the respective slide, andmoving in horizontal transverse guideways 204 formed on the adjacentpart of the main frame I03, as best shown in Figs. 2, 3, 9, and 11.

Each of these slides or carriages is preferably actuated by a motor sothat the same is retractmoved forward by the conveyor mechanism, butafter a drum has been moved forward to the expanding station by theconveyor mechanism and raised by the elevating mechanism into alignmentwith the expanding mechanism then the slides carrying the sections ofthe expanding mechanism are moved toward each other for the purpose ofbringing the expanding elements mounted on the slides into the properposition within the respective ends of the drum, preparatory toproducing the beads thereon.

The motors for this purpose preferably are of the hydraulic type andcomprise power cylinders 205d, 205e mounted horizontally and transverse-1y on the main frame below the slides 202d, 2020 and are provided withpistons 206d. 206e, each of which has a rod 201 projecting through theouter head of the respective cylinder. The pistons of these motors haveuniform throw and are reciprocated within their cylinders by alternatelyadmitting live pressure medium to and discharging the spent pressuremedium at opposite ends of this cylinder by a suitable valve mechanism.

In order to permit of adjusting the position of each slide 202d, 202ewith reference to the hydraulic motor which actuates the same and enablethe expanding elements of the respective slide to be so located that thebeads are produced at the desired place on the barrel bodies, means areprovided whereby each slide may be adjusted lengthwise with reference toits motor.

In the preferred form these means, as shown in Figs. 2, 3, and 11comprise across head 208 secured'to the outer end of each'of the pistonrods 201, and longitudinal adjusting screws 209 which are mounted onbrackets 2l0 on an adjacent part of the respective slides so as to becapable of rotation thereon but held against lengthwise movementthereon, and having threaded engagement with nuts 2 on the adjacent partof the cross heads 208. Upon turning each screw 209 in-one direction orthe other the respective slide and the expanding mechanism mountedthereon will be moved lengthwise of its motor but transversely of thepath of the drums and thereby enable the expanding mechanism to beaccurately located for performing thebead expanding operation properlyon the respective end of the drum.

Means are provided for causing the two slides which carry the twosections of the bead expanding mechanism to move simultaneously,horizontally and transversely relative to the conveyor' mechanismintoand out of their operative posierly form the beads at opposite endsof the barrel body.

A satisfactory means for accomplishing this purpose is shown in thedrawings and comprise an equalizing gear wheel 2|2 rotatably mounted bymeans of a vertical axle 2|3 which is journaled on a part of the mainframe of the machine below the path of the conveyor adjacent to the beadexpanding mechanism, as best shown in Figs. 4 and 7, and meshing on itsdiametrically opposite sides with gear racks 2, each of which isarranged transversely-of the machine and is connected at its outer endby means of an attaching arm 2l5 with the respective cross head 200. Bythis meansthe pistons 206 of both hydraulic motors which shift theexpander supporting carriages or slides are compelled to move in unisoninto and out of their operative positions and thus insure the propertiming of the operation of the two sections of this expanding mechanismon opposite ends of the drum.

Upon each of the slides or carriages 202d, 202a of the bead expandingmechanism is mounted means for producing a circumferential bead adjacentto one end of the body of the sheet metal barrel by expansion of themetal thereof from the interior of the body, which means are identicalin construction so that the following description of one will apply toboth of these means, but for convenience in subsequently describing theoperation of the machine as a whole the means for expanding a bead onone end of the barrel body is identificd by the reference character D,and the means for expanding a bead adjacent to the opposite end of thebarrel body will be identified generally by the reference character E.

Upon the upper part of each slide 202d, 202a is mounted a support 2|6which is generally of hollow shape and in effect forms a part of therespective slide and reciprocates transversely therewith. Arrangedhorizontally and transversely with refercnce to the line of movement ofthe barrel drum feeding mechanism and centrally within the hollowsupport 2 l 6 of each of the carriages 202d,

2521: is a reciprocating shifting or follower rod 2 l1 which is guidedat its front and rear ends on guideways 2l8, 2l9 forming part of thisslide or carriage. Reciprocating movement is imparted to this shiftingrod by means of a motor which is preferably of the hydraulic type andmounted on the respective carriage so as to move bodily therewith.

As best shown in Figs. 1, 2, and 3 these bydraulic motors comprise powercylinders 220d, 22Ee mounted respectively on the outer or rear ends ofthe carriages 292d, 202s and pistons 22kt, 22le reciprocating lengthwisein these cylinders and each provided with a piston rod 222 which isconnected by means of a coupling with the outer end of the respectiveshifting rod 211, as best shown in Figs. 3 and 10. This couplingconsists of two coupling blocks 223 which are clamped against oppositesides of the opposing ends of each piston rod 222 and the shifting rod 2l1 and held together by means of screws 224, one end of these blockshaving threaded engagement with the piston rod, as shown at 225, and theopposite end of these blocks being provided. with internal flanges 225which engage with an annular groove 22'! in the adjacent outer'or rearend of the respective shifting rod 2, as shown in Fig. 10.

A pressure medium is alternately admitted into and discharged when spentfrom opposite ends of each of the cylinders 220d, 220e for the purposeof reciprocating the pistons therein by a suitable controlling valvemechanism.

The numeral 228 represents an inner or front follower which is connectedwith the inner or front end of each follower or shifting rod 211 and thenumeral 229 is an outer or rear follower secured to the rear part ofthis follower rod. Around the inner or front follower 228 a plurality ofexpandin jaws, shoes or dies 230 are arranged in an annular row, each ofthese jaws or dies being provided with a forming face 23| which is ofsegmental form circumferentially of the axis of the follower rod and ofrounded form in cross section. These several expanding jaws or dies aremovable radially simultaneously for the purpose of contracting theseveral expanding dies asa whole and reducing the diameter of theforming surfaces thereof in order to permit of introducing theseexpanding dies into one end of the body of the sheet metal barrel whichis to be operated upon ace-2,247

and thereafter spreading or moving these dies radially outward for thepurpose of increasing the diameter of the forming surface of the severalexpanding dies and causing them to simultaneously engage the interior ofthe sheet metal body of the barrel and deflect that part of the metalthereof which is engaged by these forming faces outwardly so as to forman annular bead on the barrel body, as shown in the left hand part ofFig. 3 in connection with the section D of the expanding mechanism.

After the metal of the barrel body or drum has been thus expanded toform this annular outwardly projecting bead thereon the several dies areagain contracted so as to reduce the dimeter of the forming facesthereon and permit these expanding dies to be withdrawn from therespective end of the barrel body. This radial movement of the expandingdies is produced by motion derived from the longitudinally movablefollower rod 2H and its front and rear follower heads 228, 229. Themeans for this purpose include a plurality of longitudinal expandinglevers 232 arranged in an annular row around the follower rod 2| each ofthese levers being pivoted between its front and rear ends by means of apivot 233 to the adjacent part of the carriage support 2I6. Each leverhas one of the expanda ing dies 230 secured to its front end. An annularrow of front radial toggles or links 234 is provided, each of which ispivotally connected at its inner and outer ends with the periphery ofthe front follower and the inner end of one of the dies 230. An annularrow of rear toggles or toggle links 235 is provided, each of which ispivotally connected at its inner end with the rear arm of one of theexpanding levers 232 and pivotally connected at its outer end with theperipheral part of the rear follower 229, as shown in Figs. 3, 8, and 9.

While each carriage or slide is effecting its forward movement therespective follower rod 2|! and the followers mounted thereon arearranged in their rearmost position relative to this carriage so thatthe front and rear sets of toggles assume an inclined position and causethe several expanding levers and the expanding dies to be-moved in adirection which will contract the dies and permit the same to beintroduced into an end of the drum or body of the barrel, as shown inconnection with the right hand section E of the bead expandingmechanism.

After the expanding dies have reached the desired position within thesheet metal drum or body of the barrel, each expander supportingcarriage remains at rest and the follower rod 2|! and its followers 228,228 are moved forwardly or inwardly whereby the front and rear sets oftoggles 234, 235 are shifted from the inclined position shown inconnection with section E to the straightened or radial position shownin connection with section D of the expanding mechanism, thereby causingthe several expanding dies to engage the bore of the sheet metal drum orbody and force the same radially outward, and producing an annular orcircumferential bead I02 on the exterior of this drum or body, as shownin connection with section D of the expanding mechanism in Fig. 3. Eachexpander carriage or slide remains at rest until the several expandingdies associated therewith have been contracted into their inoperativeposition.

The mechanism for shifting the expanding mechanisms bodily into and outof their operative position and expanding and contracting the formingdies of the several expanding devices is so timed that one set ofexpanding dies is expanded and contracted while the other set ofexpanding dies is at rest in a contracted position, and after the firstset of dies has been expanded and contracted the second set of dies isexpanded and contracted, and after both sets of dies have been thusexpanded and contracted, both of the respective expander carriages orslides are again moved rearwardly or outwardly relative to the drumconveying mechanism in order to permit the respective drum to beadvanced another step in its progress through the machine.

By thus operating the expanding devices successively the metal of thebody is free to fiow lengthwise in one direction while forming one ofthe beads and lengthwise in the opposite direction while forming theother bead, and thus avoid stretching the metal improperly.

In order to guide the front part of the expanding mechanism of eachsection properly into the respective end of the drum or barrel body,guiding means are provided which are movable with the carriage of eachexpanding section and engage with the inner side of the top of each drumor body. In its preferred construction the guiding means associated witheach section of the expanding mechanism comprises a guide bar 236arranged lengthwise adjacent to the upper part of the support 2l6 ofeach of the carriages or slides 202d, 2021: and having its front endsecured to-a tubular extension 231 (see Figs. 2 and 3) of the respectivesupport 2l6 and provided with an inclined outer face 238, and anadjusting screw 239 arranged on the rear part of the guide bar 236 andengaging with the adjacent part of the support 2l6, as shown in Fig. 3.As each of the carriages 202d, 2ll2e moves forwardly or inwardly therespective inclined face 238 of the guide bar 236 engages with the upperpart of the bore of the barrel body or drum at one end thereof, andraises the same into engagement with the adjacent abutment I96 until thedrum engages with the horizontal rear part 24l of this bar, therebyproperly centering the drum with reference to the several expanding diesbefore the latter are engaged with the bore of the drum and produce anoutwardly projecting bead thereon. The front arms of the expandinglevers 232 are preferably guided in their radial movements by radialguide slots 240 (see Figs. 1 and 2) which are formed on the front endsof the support extension 23! and'receive the respective arms of theselevers, as best shown in Figs. 1, 2, and 3.

As an additional means for accurately locating the barrel drum or bodywith its longitudinal axis transversely of the conveyor mechanism andparallel with the line of movement of the carriages or slides of the twosections of the expanding mechanism, each of these slides is providedwith end gaging means which are adapted to engage with opposite ends ofthe barrel drum or body during the last part of the forward or inwardmovement of these slides toward each other, and thereby definitelylocate this drum between these slides preparatory to forming the beadsthereon.

In the preferred construction these end gaging means comprise two gagingplates 254 arranged adjacent to the upper part of each expandersupporting slide or carriage on opposite sides of the longitudinalcenter thereof in position to engage with the upper part of one end ofthe barrel drum when the respective slide is in its foremost orinnermost position. Each of these end gage plates is capable oflongitudinal adjustment on the respective slide for the purpose ofadapting the same to drums of different length, this being accomplishedin the present instance by means of a horizontal longitudinal adjustingrod 255 secured at its front end to the respective end gage plate 254and passing withits rear part through a supporting lug 256 on theadjacent part of the slide, and clamping screw nuts 251 arranged on saidgage supporting rod and bearing against opposite sides of said lug, asshown in Figs. 1, 2, and '7. Each of the gage plates is also capable ofradial adjustment with reference to the axis of the respective expandingmechanism by extending the rod 255 at its front end through alongitudinal slot 258 in said gage plate and providing this rod with twoclamping screw nuts 259 which bear against opposite sides of said gageplate, as best shown in Figs. 1, 2, and 7.

In the operation of this machine both sections of the expandingmechanism mounted respectively on the slides or carriages are movedinwardly simultaneously and also outwardly simultaneously, but theexpanding dies of the two.

sections are actuated so that they perform their expanding operationssuccessively instead of simultaneously. During these expandingoperations the expanding dies of one expanding section are first spreadfor forming a head on one end of the body or drum, and then these diesare contracted out of engagement from the drum. After one set ofexpanding dies has thus per- "formed its beading operation and releasedthe drum the other set of expanding dies of the other section are movedradially outward for forming a bead on the opposite end of the drum orbody, and then these last-mentioned dies are again contracted out oftheir operative engagement from the same. By this means those parts ofthe metal drum adjacent to the place where each head is being formed arefree to fiow in order to form the laterally projecting bead thereonwithout producing any undue stretching or thinning of the metal and thusavoiding weakening of the same.

In order to guide the drum or body of a sheet metal barrel into theposition for locating its opposite ends relative to the respectiveexpanding devices where the drum comes to rest under the action of theconveyor or feeding mechanism, guiding means are provided whichpreferably consist of two guide plates 242 secured to a suitablestationary' part of the machine, and provided at their rear ends withinclined front faces 243 which converge forwardly, and straight rearparts 244 which are parallel with each other. As the drum or body of thebarrel is moved forwardly by the conveyor mechanism the opposite ends ofthe barrel are engaged by the inclined rear parts 243 of the guides 242and directed into the space between the parallel rear parts 242, aclamping plate 246 between which and an adjacent part 241 of the mainframe said adjusting arm 245 is received, and clamping screws 248 whichconnect the clamping plate 246 with said frame member 241 and serve togrip said arm 245 for holding it against displacement after the same,together with the guide bar 242, have been adjusted to the desiredposition.

After both sections of the expanding mechanism have been withdrawn fromopposite ends of the drum or body of the barrel the lifting mechanism islowered for again depositing the drum upon the adjacent part of thefeeding or conveying mechanism, and then the latter advances anotherstep to the next station of the machine preparatory to discharging thebarrel'body from the machine.

The hydraulic motors which are mounted on the expander supporting slidesor carriages must be supplied with fluid under high pressure in order tooperate the same, and as this fluid is taken from a pressure means whichis located at a definite or fixed place, and the cylinders which operatethe bead expanding dies or shoes move with the carriages supporting theexpanding mechanism, it is necessary to employ flexible means wherebythe hydraulic pressure fluid is conducted to and discharged from eachend of the cylinders 220d, 220a which form parts of the hydraulicmotors, whereby the expanding dies or shoes are actuated.

It has been found that flexible hose is not satisfactory for thispurpose inasmuch as it lacks strength and durability. A telescopicpiping connection of metal has therefore been provided for each of theconduits leading to each end of these hydraulic motor cylinders, each ofthese telescopic piping connections being constructed as follows, andbest shown in Figs. 1, 2, 3, 5,'

and 6:-

The numeral 260 represents an inner telescopic pipe of metal which ismounted stationarily on the main frame below the path of one of theexpander supporting slides and provided intermediate of its endsv with alateral port or opening 26l; and the numeral 262 represents an outertelescopic pipe which surrounds the inner pipe 260 and is of largerdiameter and spaced therefrom by an interveningpassage whichcommunicates with the lateral opening or port 26! of the inner pipe.This outer pipe is mounted on the underside of the respective carriageor slide so as to move therewith and cause the outer pipe to bereciprocated lengthwise of the inner pipe, a tight joint being effectedbetween oppositev ends of the outer telescopic pipe 260 by means ofstuffing boxes or packings 263 in order to avoid leakage at theseplaces.

The location of the lateral port 26l of the inner pipe and the stroke ofthe respective carriage or slide is such that at either extreme of thisstroke the port or opening 26l will always be in communication with theinterior of the outer telescopic pipe and thereby maintain a constantfluid connect-ion between the inner and outer pipes. One end of theinner telescopic pipe communicates with a, pressure fluid conducting thepipe 264, and the outer telescopic pipe communicates with a pressurefluid conducting pipe 265, which last-mentioned pipes 264 and 265 formpart of the conduit whereby the pressure fluid is conducted to and fromone end of one of the cylinders of the hydraulic motors which operatethe two sections of the expanding mechanism.

In the present case the pipe 265 leads to one end of one'of thesecylinders, and the pipe 264 leads to the source of fluid'pressure supplyand suitable valve mechanism which controls the same to and from therespective cylinder.

Obviously the inner pipe might be mounted on the carriage or slide andthe outer pipe mounted on the stationary frame, in which case the innerpipe would be connected with the respective motor cylinder and the outerpipe with the fluid pressure supply, this being a reversal of theorganization shown in Figs. 3, 5, and 6.

I claim as my invention:

1. A machine of the character described, comprising beading means forforming a circumferential bead on the body of a sheet metal barrelincluding a plurality of beading dies arranged in an annular row andadapted to move radially relative to the axis of said body, and meansfor actuating said dies including a plurality of levers arrangedlengthwise of the axis of said body and each connected at one end withone of said dies, and operating means connected with the opposite endsof said levers, including a follower movable lengthwise of the axis ofsaid barrel, and toggle links each connecting the follower with one ofsaid levers.

2. A machine of the character described, comprising beading means forforming a circumferential bead on the body of a. sheet metal barrelincluding a plurality'of beading dies arranged in an annular row andadapted to move radially relative to the axis of said body, and meansfor actuating said dies including a plurality of two armed leversarranged lengthwise of the axis of said body and each having one of itsarms connected with one of said dies, a follower movable lengthwise ofthe axis of said barrel, and a plurality of toggles each pivoted at itsopposite ends on said follower and the other arm of one of said levers.

3. A machine of the character described, comprising beading means forforming a circumferential bead on the body of a sheet metal barrelincluding a. plurality of beading dies arranged in an annular row andadapted to move radially relative to the axis of said body, and meansfor actuating said dies including a plurality of levers arrangedlengthwise of the axis of said body and each connected at its front endwith one of said dies, a follower rod movable lengthwise of the axis ofsaid body, front and rear followers secured to said rod, a plurality offront toggles each pivoted at its opposite ends to said front followerand one of said dies, and a plurality of rear toggle links eachpivotally connected at its opposite ends with said rear follower and therear end of one of said levers.

4. A machine of the'character described, comprising beading means forforming a circumferential bead on the body of a. sheet metal barrelincluding a plurality of beading dies arranged in an annular row andadapted to move radially relative to the axis of said body, and meansfor actuating said dies including a. plurality-of levers arrangedlengthwise of the axis of said body and each connected at its front endwith one of said dies, a follower rod movable lengthwise of the axis ofsaid body, front and rear followers secured to said rod, a plurality offront toggles each pivoted at its opposite ends to said front followerand one of said dies, a plurality of rear toggle links each pivotallyconnected at its opposite ends with said rear follower and the rear endof one of said levers, and a hydraulic motor for actuating said followerrod having a cylinder, a piston connected with said follower rod, and avalve mechanism for alternately admitting and discharging pressuremedium from opposite ends of said cylinder.

5. A machine of the character described comprising beading means forforming a circumferential bead on the body of a sheet metal barrelincluding a plurality of beading dies arranged in an annular row andadapted to move radially relative to the axis of said body, and meansfor actuating said dies including a plurality of levers arrangedlengthwise of the axis of said body and each connected at its front endwith one of said dies, a follower rod movable lengthwise of the axis ofsaid body, front and rear followers secured to said rod, a plurality offront toggles each pivoted at its opposite ends to said front followerand one of said dies, a plurality of rear toggle links each pivotaliyconnected at its opposite ends with said rear follower and the rear endof one of said levers, a hydraulic motor for actuating said follower rodhaving a cylinder, a piston connected with said follower rod, and avalve mechanism for alternately admitting and discharging pressuremedium from opposite ends of said cylinder, a barrel body holder, and aplurality of slides each carrying one of said beading means and movabletoward and from opposite sides of saidbarrel body holder.

6. A machine of the character described comprising means for supportingin an operative position a sheet metal barrel body, two separate beadforming devices adapted to receive a barrel body between them, andactuating means for said head forming devices adapted to successivelymove said devices into and out of engagement with opposite ends of saidbody and form beads thereon first at one end of the body and then at theopposite end thereof.

7. A machine of the character described comprising means for supportingin an operative position a sheet metal barrel body, two separate beadforming devices adapted to receive between them a barrel body andadapted to form beads on opposite ends of said body, and operating meansfor moving said bead forming means forwardly into an operative positionrelative to the ends of said body, then actuating one of said devices toform a head on one end of the body, then actuating the other of saiddevices to form a bead on the other end of said body, and then movingboth of said deviccsbackwardly into an inoperative position relative tosaid body.

8. A machine of the character described comprising means for supportinga sheet metal barrel body, a plurality of forming means for formingheads at opposite ends of the sheet metal body, shifting means formoving said forming means into and out of opposite ends of said barrelbody, and actuating means for said forming means adapted to first expandand contract the forming means at one end of the barrel body into andout of engagement with said body for forming a bead on the respectiveend thereof and thereafter expanding and contracting the other formingmeans at the other end of said body into and out of engagement with saidbody for forming another bead at the last mentioned end thereof.

9. A machine of the character described, com prising beading means forforming a circumferential bead on the body of a sheet metal barrelincluding a plurality of beading dies arranged in an annular row andadapted to move radially rel-- ative to the axis of said body, and meansfor actuating said dies including a plurality of levers arrangedlengthwise of the axis of said body and metal barrel, beading means forforming a circumferential bead on said body including a slide movabletoward and from said body supporting means, expanding elements mountedon said slide and adapted to engage the inner side of said body, andshifting means for moving said slide toward and from said body supportincluding a. power cylinder, a piston reciprocable in said cylinder andhaving a rod, and means for adiustably connecting said rod and slideincluding a cross piece slidable lengthwise on said slide and connectedwith said rod, and an adjusting screw having a threaded engagement withsaid cross piece and mounted on said slide so as to be rotatable thereonbut held against lengthwise movement relative thereto.

11. A machine of the character described, comprising supporting meansfor supporting the body of a sheet metal barrel, beading means forforming circumferential beads on said body adjacent to opposite endsthereof including guideways arranged at opposite ends of said bodysupporting means, slides movable toward and from each other on saidguideways, bead forming elements mounted on each of said slides andadapted to engage with the inner side of said body adjacent to theopposite ends thereof, means for causing said slides to movesimultaneously toward and from each other including parallel gear rackssecured respectively to said slides, and a gear whekesl meshing onopposite sides with said gear rac 12. A machine of the characterdescribed, comprising supporting means for supporting the body of asheet metal barrel, beading means for forming circumferential beads onsaid body adjacent to opposite ends of said body supporting means,slides movable toward and from each other on said guideways, beadforming elements mounted on each of said slides and adapted to engagewith the inner side of said body adjacent to the opposite ends thereof,means for causing said slides to move simultaneously toward and fromeach other including parallel gear racks secured respectively to saidslides, a gear wheel meshing on opposite sides with said gear racks, ahydraulic motor for shifting each of said slides, and valve mechanismfor controlling the pressure medium to and from opposite ends of thepower cylinder of each motor. i

13. A machine of the character described, comprising holding means forholding the body of a sheet metal barrel, beading means for forming acircumferential bead on said body including a slide movable toward andfrom said holding means, laterally movable beading shoes mounted on saidslide and adapted to engage the inner side of said body, a fluidoperated motor for which form part of the pressure fluid conduitcommunicating with one end of said cylinder.

14. A machine of the character described, comprising holding means forholding the body of a sheet metal barrel, beading means for forming acircumferential bead on said body including a slide movable toward andfrom said holding means, laterally movable beading shoes mounted on saidslide and adaptedto engage the inner side of said body, a fluid operatedmotor for actuating said shoes including a power cylinder mounted onsaid slide and a piston arranged in said cylinder and connected withsaid shoes, and means for supplying pressure fluid to and dischargingthe same from opposite ends of said cylinder including an inner pipearranged parallel with the line of movement of said slide and having aport in its side, and an outer pipe enclosing said inner pipe andconstantly communicating with said port, one of said pipes connectingwith a fluid conduit and the other with said cylinder, and said pipesbeing movable one lengthwise relative to the other.

15. A machine of the character described, comprising means for holdingthe body of a sheet metal barrel, beading means for forming acircumferential bead on said barrel including a slide movable toward andfrom said holding means, beading shoes mounted on said slide and movablelaterally into, engagement with the inner side of thebody, and guidemeans arranged on said slide and adapted to engage the upper part of theinner side of said body.

16. A machine of the character described, comprising means for holdingthe body of a sheet metal barrel, beading means for forming acircumferential bead on said barrel including a slide movable toward andfrom said holding means, beading shoes mounted on said slide and movablelaterally into engagement with the inner side of the body, and guidemeans arranged on said slide and adapted to engage the upper part of theinner side of said body, and comprising a longitudinal guide bar havingits front end secured to the slide and provided with an inclined faceadapted to engage the bore of the barrel body, and an adjusting screwthreadingly engaging the rear end of said guide bar and engaging theadjacent part of said slide.

17. A machine of the character described, comprising means for holdingthe body of a sheet metal barrel, beading means for formingcircumferential beads on said body adjacent to opposite ends thereofincluding two slides movable toward and from opposite ends of saidholding means, beading shoes operatively mounted on each of said slidesand adapted to form one of said beads on the body, and means foractuating said shoes and timed to operate successively on said body.

18. A machine of the character described, comprising means for holdingthe body of a sheet metal barrel, beading means for formingcircumferential beads on said body adjacent to opposite ends thereofincluding two slides movable toward and from opposite ends of saidholding means, beading shoes operatively mounted on each of said slidesand adapted to form one of said beads on the body, and means foractuating said shoes and timed to operate successively on said body,including hydraulic motors mounted respectively on said slides and eachoperatively connected with the beading shoes mounted thereon, and valvemechanism controlling the admission and discharge of pressure fluid toand from each hydraulic motor and operating to cause the beading shoesof one slide to be engaged with and disengaged from the inner side ofthe barrel body in advance of the engagement and disengagement of theother beading shoes with said barrel body.

19. A bead-forming machine, having two circular expanding dies mountedfor movement in opposite directions into and out of the ends of ametallic drum positioned between the dies, and means for moving the diesinto the drum and for expanding the dies in a manner to form the beadssubstantially separately in point of time.

20. A bead-forming machine, having in combination, two circular diesmounted for movement in opposite directions into and out of the ends ofa metallic drum positioned therebetween and mechanisms for actuating thedies substantially simultaneously but in a different timed relation.

21. A bead-forming machine, having in combination, two circular diesmounted for movement in opposite directions, and mechanisms foractuating the two dies to move them into the opposite ends of a metallicdrum positioned therebetween, said mechanisms including means foroperating the two dies one in advance of the other.

22. A bead-forming machine, having in combination, two circular diesmounted for movement in opposite directions and mechanisms for oppositeends of a metallic drum positioned therebetween, said mechanismsincluding means for operating the two dies in a predetermined order toform two beads substantially in succession.

23. A bead-forming machine having a bed, two expanding dies, headsslidably supported on said bed and carrying said dies for movement intoand out of the opposite ends of a metallic drum, and a single actuatingmechanism for each head and die including means for operating the dierelative to the head.

24. A machine of the character described, hav ing an expanding andcontracting die, a slidably supported head carrying said die, and asingle actuating mechanism for moving the head and for operating saiddie independently of continued movement of said head.

25. The method of forming two spaced beads in a metallic drum whichconsists in introducing into the drum two expansible dies, and causingsaid dies to be expanded in a predetermined order so as to form one ofsaid beads in advance of the other. i a

26. The method of forming two spaced beads in a metallic drum whichconsists in supporting the drum in a stationary position, introducingtwo expansible dies into the opposite ends of the actuating the two diesto move them into the drum, and then expanding said dies one in adinsuccession.

BROR J. IMDGREHI.

